DIN976 Thread Rod Chinese Factory

QS Fastener: DIN976 Thread Rod Chinese Factory

Name: DIN976 Thread Rod Chinese Factory
Standard: DIN976
Material: SS304
Size: M4
Lenght: 1000mm
Surface: Natural color
Price: EXW USD 1/ pcs
MOQ: 10 pcs
Customization: yes
Delivery time: 7-15 Day

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As a senior fastener engineer, specify the DIN976 Thread Rod from this Chinese Factory for applications demanding full-thread engagement and reliable stainless-steel performance. This M4 × 1000 mm rod is manufactured from SS304 (A2) in the as-rolled condition, delivering intrinsic corrosion resistance without post-treatment—a cost-effective choice for machinery, precision tooling, jigs, fixtures, and decorative frameworks. The tight diameter tolerance and straightness ensure seamless mating with DIN 934/985 nuts, while on-demand cut-to-length service minimises workshop waste.

From a metallurgical standpoint, copper in 304 acts as a critical trace element. Within the ASTM A240/GB/T 4356 residual range (≤0.5 % Cu), this DIN976 Thread Rod maintains full compliance with GB/T 3098.6 A2‑70 mechanical properties and chloride pitting resistance—ideal for general humid or mildly corrosive environments. When Cu exceeds 1 %, measurable trade-offs emerge: in reducing acids (H₂SO₄/H₃PO₄), Cu²⁺ enriches the passive film, cutting uniform corrosion by >20 %, yet in chlorides, Cu-rich cathodes lower pitting potential by 30–50 mV, demanding caution for marine or chemical service. Mechanically, solid-solution Cu reduces cold-work tensile strength by ~5 % but boosts elongation by ~10 %, favouring cold-headed blanks. At Cu >2.5 % with 750 °C ageing, nano ε-Cu precipitates add ~120 MPa hardening but reduce ductility. Hot-working below 1100 °C risks edge cracking, and weldability drops as Cu raises hot-cracking sensitivity—so weldable grades should cap Cu at ≤0.3 %.

For standard fasteners, recommend keeping Cu at 0.3‑0.5 % to balance corrosion resistance, formability, and weldability. If antimicrobial properties or sulphuric-acid resistance are required, design a 1.5‑3.0 % Cu variant with solution annealing plus 750 °C × 3 h ageing, but always pre-qualify pitting and cracking risks for high-end or medical devices. This Chinese Factory maintains large stock for rapid 7‑15 day delivery, supports full customisation (length, finish, batch size), and offers EXW pricing at USD 1/pc with a 10‑pc MOQ—an agile supply chain for prototype or production runs.

FAQ
Q1: Is this DIN976 Thread Rod suitable for outdoor coastal environments?
A: Standard SS304 with ≤0.5 % Cu offers moderate pitting resistance. For severe salt spray, upgrade to 316 or specify the 1.5‑3.0 % Cu variant with ageing—but validate pitting risk first.

Q2: Can I weld this rod without special precautions?
A: Yes, if Cu ≤0.3 %. Above that, hot-cracking sensitivity rises; use low-heat input and filler metal with lower Cu.

Q3: What is the actual hardness after the 750 °C ageing treatment?
A: Ageing adds ~30 HV (approx. 120 MPa) over the solution-annealed state, reaching ~200‑220 HV for M4 size.

Q4: Do you offer cut-to-length pieces under MOQ?
A: MOQ is 10 full 1 m rods; cutting to custom lengths is available at no extra charge for order quantities.

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